高集成的单基分辨率地图的表观基因组在阿拉比多普西斯
Ryan Lister1, Ronan C O'Malley, Julian Tonti-Filippini
1Plant Biology Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
Cell
|April 22, 2008
概括
这项研究利用DNA甲基化 (甲基C-seq),转录组 (mRNA-seq) 和小RNA (smRNA-seq) 数据绘制了植物表观基因组图. 研究结果揭示了广泛的DNA甲基化,其与smRNA的联系,以及对基因表达的影响.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因组学就是基因组学.
背景情况:
- 表观遗传调节,特别是DNA甲基化,对于植物发育和环境反应至关重要.
- 了解DNA甲基化,小RNA和基因表达之间的相互作用至关重要.
研究的目的:
- 通过使用甲基C-seq,mRNA-seq和smRNA-seq生成Arabidopsis thaliana的综合表观基因组图.
- 为了研究DNA甲基化,小RNA生物发生和转录调节在单基分辨率之间的关系.
主要方法:
- 通过合成测序技术用于直接测序细胞酸甲基组 (甲基C-seq),转录组 (mRNA-seq) 和小RNA转录组 (smRNA-seq).
- 对野生类型的Arabidopsis thaliana和影响DNA甲基转移酶或脱甲基酶活性的突变物进行了分析.
主要成果:
- 在单基分辨率下发现了广泛的,以前未被检测到的DNA甲基化,确定了甲基化背景和局部序列效应.
- 观察到小RNA位置和DNA甲基化之间的直接关系,包括在CpG DNA甲基化损失时小RNA生物发生的扰乱.
- 小RNA显示出在RNA-DNA同质区域中直接链特异性DNA甲基化的倾向.
- 链特异性mRNA-seq显示,在DNA甲基化状态的修改后,许多基因,转位子和基因间转录的转录丰度发生变化.
结论:
- 综合表观基因组图为DNA甲基化模式及其在植物中的调节提供了前所未有的分辨率.
- 小RNA在指导DNA甲基化方面发挥着重要作用,并受到DNA甲基化状态的影响.
- 表观遗传修饰,包括DNA甲基化,深深影响Arabidopsis thaliana中的基因表达,转子子活性和潜在的其他基因组元素.
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